#171D8D#171D8D

#171D8D is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.7% C 0.177 H 269.3°. Best body text is #FFFFFF at 13.15:1 contrast (WCAG AA passes).

Color values

HEX	#171D8D
RGB	rgb(23, 29, 141)
HSL	hsl(237, 72%, 32%)
HSV	hsv(237, 84%, 55%)
CMYK	cmyk(83.7%, 79.4%, 0%, 44.7%)
CIE-LAB	lab(19.98, 39.47, -61.21)
CIE-LCH	lch(19.98, 72.83, 302.82°)
OKLab	oklab(32.69% -0.0023 -0.1773)
OKLCH	oklch(32.69% 0.177 269.3)
XYZ	xyz(5.5988, 2.9833, 25.4749)
Luminance	0.0298 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D8D #8D8717

analogous

#17588D #171D8D #4C178D

triadic

#171D8D #8D171D #1D8D17

tetradic

#171D8D #8D1758 #8D8717 #178D4C

square

#171D8D #8D1758 #8D8717 #178D4C

split-complementary

#171D8D #8D4C17 #588D17

monochromatic

#060724 #0E1258 #171D8D #2028C2 #3F47E0

Accessibility & contrast

On white

13.15

#171D8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#171D8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D8D

13.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D8D	#FFFFFF	#000000	##FFFFFF
##171D8D	1.00	13.15	1.60	13.15
#FFFFFF	13.15	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003690

Deuteranopia (green-blind)

#002A8B

Tritanopia (blue-blind)

#003F54

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #171d8d;
/* rgb */ color: rgb(23, 29, 141);
/* oklch */ color: oklch(32.7% 0.177 269.3);

Tailwind

colors: {
  custom: {
    50: '#6d5bb0',
    500: '#171d8d',
    950: '#000000',
  },
}

SCSS

$custom: #171d8d;
$custom-light: #6d5bb0;
$custom-dark: #000000;

JSON

{
  "hex": "#171d8d",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 141
  },
  "hsl": {
    "h": 236.949,
    "s": 71.951,
    "l": 32.157
  },
  "oklch": {
    "l": 0.32693,
    "c": 0.17734,
    "h": 269.3
  },
  "luminance": 0.02984
}

Semantic roles & 50–950 ramp

primary

#171D8D

secondary

#C0B940

accent

#E539EF

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#080411

muted

#7B7980

Preview Lab

Preview with #171D8D

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →